Jump to content
View in the app

A better way to browse. Learn more.

SSA® Car Audio Forum

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

SPL & SQ / Fabrication

Calculations, Concepts, Designs, Theories. All General SPL Or SQ Questions Can Be Discussed Here.

  1. In the trunk of my car, there are two bars running across the top of my trunk, that attach to my trunk lid, i suppose its there to adjust tension for my trunk lid, will if i remove those i can get an extra 2" height and that will make a large difference for my enclosure and layout in general. Anyone remove these before?

    • 0

      Reputation Points

    • 29 replies
    • 2.6k views
  2. Started by Mark LaFountain,

    I had to get a pic on my cell, only camera I had at the time.

    • 0

      Reputation Points

    • 18 replies
    • 2.6k views
  3. this is ALTONS post "FYI the box is EXACTLY in the middle of the specs Fi gives for the 12" Q's. Fi recommends 1.8 to 2.4cuft as optimal for a 12" Q, 3.6 to 4.8 for two obviously. If you notice the notes I specifically mention 4.2cuft NET which means before displacements, there's nothing wrong with the space I've given for the Q's." and i STEALTH said "actually net means after displacements. gross is before. lol" ALTON said "taken directly from the dictionary buddy: gross    /groʊs/ Show Spelled [grohs] Show IPA adjective,-er, -est, noun,pluralgross for 11, gross·es for 12, 13; verb –adjective1.without deductions; total, as the amount of sales, salary, profit, etc., be…

    • 2

      Reputation Points

    • 26 replies
    • 2.6k views
  4. Started by Maggotpuffin,

    How do i tell if its my sub or my box or my tuning that is making certain notes hit weird like the song run this town by jay z sounds like s**t in my car. Btw i have an L715 in a 4.44 cubic ft internal box tuned to 34hz and it is ran by a kx1200.1 that does 1400 rms. Thanks.

    • 0

      Reputation Points

    • 27 replies
    • 2.6k views
  5. Hello all, I'm new to this forum, but not to car audio. I am however new to the Sundown woofers. I'm hoping you all can lend some help and thank you in advance on my enclosure design. What I have is an 05 Acura TL I'm doin a pair of Sundown SA12s in the trunk. Subs to be fired foward and a 6in Aero either out the back or side. I have tried several enclosures with foward fired subs & port, but the car just did not really like it. Last setup was a single CV Stroker12, power was supplied by an O.S. USamps VLX400 1ohm mono. I had good results with two 4in PVC ports fired back, Sub obviously foward. Then tried a 6in Aero out the drivers side of box. The Aero was slightly b…

    • 0

      Reputation Points

    • 2 replies
    • 2.5k views
  6. Started by rex00,

    Hey everyone. What do you think would be the best for music and spl box size for a 15" Zcon. Been looking but can't find the suggested box sizes on here. Thanks guys.

    • 1

      Reputation Points

    • 21 replies
    • 2.5k views
    • 1 follower
  7. Started by imhungnurnot,

    Has anyone ever heard of this guy? And are his designs worth the money? His website is: PWK Designs

    • 0

      Reputation Points

    • 15 replies
    • 2.5k views
  8. Started by JRC,

    i have a 96 s10 reg cab and in order to have a bigger system im forced to build a blow-thru. ive decided that my best option is to do a 4th order bandpass with the port coming through the back of my cab. i like the idea of having a single octo-port (just because i think they look effin b-a). ive done read just about everything you can find on the net and also talked to a few guys who have them....but everyone says something different....my question is how do you tune these things??? "golden ratio/theory"??? i plan on using 4 Lanzar Max Pro 15's (yes i know what your thinking) but they dont need a ton of space and power

    • 0

      Reputation Points

    • 11 replies
    • 2.5k views
  9. Started by teoulennon,

    I've decided to try a ported enclosure for my sa-10 just for kicks. I'm thinking 1.0ft^3 tuned to around 33hz. I'm not set on 33hz, it's somewhat of a guess as to what may sound good - I'm going for sq more than spl and listen to all genres so I need it to give me the accurate punch of rock as well as the lows in rap. My box is limited to a size of 8"d x 13h x 33"w The sub will pretty much be right up against the rear shelf of the car behind the passenger seats in a porsche 911 so I was thinking it would be better to go with a side firing aeroport over a rectangular port. My box would measure roughly 8"d x 12.5"h x 31"w, making it 1.12ft^3 after sub displacement, this wou…

    • 1

      Reputation Points

    • 19 replies
    • 2.5k views
  10. 15" Xcon .... Was thinking about going sealed but then the idea of aero ports was brought up and I saw Stef's and loved the look and thought ... "Hey, a sealed enclosure is just a big box.. and a ported with aeros is just some tubing thrown inside of it and cut to the right length for tuning... I can do that.." Should I just do this? I was looking at PrecisionSoundProducts and said I could do this... Not much more work that building a sealed enclosure... Right??? So I looked up on their site for ports calculations and realized after understanding it a bit better that the Torres calculator does it as well... Here is what I come up with and it seem correct... Let me know wh…

    • 0

      Reputation Points

    • 27 replies
    • 2.5k views
  11. Started by JimJ,

    http://forum.soundillusions.net/showthread.php?t=54724 I know I posted this over on CA.com, but just in case you didn't see it... This isn't MECA-sponsored, but should be good to get out (away from the forums, hehe ) and see some people/installs. I had better see some of the B'burg crew out there

    • 0

      Reputation Points

    • 29 replies
    • 2.5k views
  12. OK, so I am hoping that some box building gurus can help me stop pulling may hair out trying to decide on what box design and subwoofer choice I should go with. As you know, the Toyota MR2 is a very small car with not much room behind its only 2 seats. It is mid engine, so the trunk in the back is of no use to me for subs. they must go right behind the seats in a wedge style box. Here is an MR2 and a pic of the space behind the seats: So I listen to all kinds of music literally, well maybe not country so much, but lots of stuff. I want it to sound musically nice but definitely want to produce as much SPL or should I say """SQL""" as possible if s…

    • 1

      Reputation Points

    • 13 replies
    • 2.5k views
  13. Started by Lord Baccus,

    the back window on my 2000 ford Explorer is Mage Flexxing !!! what can be done to stop the spl from leaking out ???

    • 0

      Reputation Points

    • 21 replies
    • 2.5k views
  14. See attached pdf for design & WinISO charts. This is the first time I've attempted this so I'm sure there's plenty wrong - looking to learn! Powered by a memphis 16-st1000d pushing 600w rms at 2 ohm. Box 2 design.pdf

    • 0

      Reputation Points

    • 11 replies
    • 2.5k views
  15. Probably a horse that's been beaten to death, but I've still got a couple questions. First off I guess the equipment in use would be a good place to start. Two Skar VVX V2 12s and a Synergy Audio WFO 15.1 amp wired to 1 ohm in the trunk of a cavalier. Listen to decaf, rock, and country so musicality is a factor. Only have one VVX in the car right now, so building a new box and deciding to forward fire and seal off versus rear fire is kinda where I'm at right now. I've never heard a sealed off box so don't have anything to reference to also. My gut feeling is sound quality would be better, especially on rock, it would meter well if sealed off properly, but would lose some …

    • 0

      Reputation Points

    • 12 replies
    • 2.5k views
  16. I knew this was how it was going down, so I went with it. I hoped to get solid replies on the input to my Alpine IVA-W505 HU. I do not want to run RCAs because they tend to be nasty dirty from PC, but I just might have to. Also IDK if I kept the AUX IN RCA connector for the HU. So I tried the 3.5mm LINE OUT on the PC to the 3.5mm in jack on the IVA thats usually used in conjunction with the USB... both go to one end of the iPOD Y-cord, and the other end is the jack to plug into the POD. I get no audio from the HU from the PC in USB, AUX, or AUX + IN. The rig: I dismantled the rig I built for the HT and rebuilt it for the VAN. RS meter and Audyssey mic. VIDEO REW …

    • 0

      Reputation Points

    • 17 replies
    • 2.5k views
  17. Vehicle : 2011 f150 Location in the vehicle: back half seat is removed Space available (Length x Width x Height): From front seat to rear wall 40" Door to door 46" floor to roof is44" Subwoofer make and model: sundown SA15 rev3 d2 Subwoofer Size: 15 Number of Subwoofers: 4 Type of Port (Kerfed, Slot, Aero, etc.): ? What type of music do you like?: all Is your goal SPL or Everyday Music?: Spl but in daily driver. 80% spl 20% sq Tuning Freq (Hz): ? Volume ? additional info- Iv tries to find the …

    • 1

      Reputation Points

    • 9 replies
    • 2.5k views
    • 1 follower
  18. Started by Neto562,

    Need help with box demensions for a custom built subwoofer The RE has tc aluminum basket 4" 8 layer flatwound aluminum voice coil 3 10" tc spider pack with 1" spacer 8 gauge ofc direct leads dual 2 ohms voice coils everything is brand new just the moter is used also has a two tone carbon fiber dust cap can take 4000 watts rms Thanks going in a astro van

    • 1

      Reputation Points

    • 19 replies
    • 2.5k views
  19. Started by cheese20323,

    What is the most accurate sub box calculator tuning and everything

    • 1

      Reputation Points

    • 6 replies
    • 2.5k views
  20. Started by KickinAudio,

    15" Power HX2 In a 91' Accord. Box is almost 7cubes. I'll post its SPL when we get it on the meter.

    • 0

      Reputation Points

    • 17 replies
    • 2.5k views
  21. Started by thebiggmann12,

    hey guys, i used the re box calculator to make a box for my 10" fi bl. the box is 1.457 cubes for my sub after port displacement. the port is tuned to 33 hz. it doesnt sound good at all. i followed the cutsheets and everything and there is no leaks in the box that i can find. im just kinda wondering why it doesnt sound good. also, i used 3/4 inch mdf for everything but the baffle and the back. i used 3/4 plywood for that. could that be why it doesnt sound good? please any help would b great. thanx.

    • 0

      Reputation Points

    • 29 replies
    • 2.5k views
  22. Started by frogcase2002,

    What all do I need to model my zcon for the new enclosure? About to start building and want to have the enclosure design as good as I can.

    • 1

      Reputation Points

    • 25 replies
    • 2.5k views
  23. Started by Mtopper,

    hey guys i'll follow mklett's pattern Vehicle : 2012 chevy cruze Location in the vehicle: trunk Space available (Length x Width x Height): 36x16x24 Subwoofer make and model: american bass xfl Subwoofer Size: 10 Number of Subwoofers: 2 or 3 Type of Port (Kerfed, Slot, Aero, etc.): slot or aero What type of music do you like?: mostly hip hop/rap but also rock Is your goal SPL or Everyday Music?: everyday Tuning Freq (Hz): 33-35 Volume :??? Questions: i'm trying to figure out the best possible orientation, size, port, and tuning for this car. i have a prefab ported box for 2 tens that i've had in the car for 2 weeks and have played it firing into car with it sealed off using…

    • 0

      Reputation Points

    • 0 replies
    • 2.5k views
  24. Started by mikey5472,

    My shop teacher has a 1 inch thick piece of plexiglass, and he said if I can find way to cut it, I can have it. I have a tablesaw, circularsaw, router, and a jigsaw, but wasn't sure if any of them would cut it. Will they?

    • 0

      Reputation Points

    • 19 replies
    • 2.5k views
  25. Started by Austin863,

    Hey guys i know this is a stupid question but when lowes cuts your wood are the cuts pretty straight. And what do they charge per cut? let me know. i've been having a hell of a time getting straight cuts with my saw and a guide clamp... for the most part they are straight but when the box is all assembled there is always a few corners that are off balance...

    • 1

      Reputation Points

    • 29 replies
    • 2.4k views

Who's Online (See full list)

  • There are no registered users currently online

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.